Honeywell H46D Installation Guide
H46D Humidity Controller
APPLICATION
The H46D Humidity Controller is used with portable and central unit humidifiers. The H46 has an spst, snap-acting switch designed for line or low voltage circuits and two leadwires for switch box mounting.
INSTALLATION
When Installing this Product…
1.Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.
2.Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.
3.Installer must be a trained, experienced service technician.
4.After installation is complete, check out product operation as provided in these instructions.
CAUTION
Disconnect power supply before connecting wiring to avoid electrical shock or equipment damage.
Location
Select a location about 5 ft (1.5m) above the floor in an area with good circulation at average temperature and humidity for the area to be controlled. Avoid locations near hot or cold air ducts and discharge air from the controlled equipment.
INSTALLATION INSTRUCTIONS
Push the wires back into the switch box.
Place the H46 against the adapter plate, making certain the tab at the bottom of the plate fits into the notch on the H46.
Fasten the H46 to the adapter plate by tightening the captive screw.
Replace the cover and the setting knob.
2 X 3 IN. ADAPTER PLATE SWITCH BOX SCREWS (2)
H46 CAPTIVE
MOUNTING SCREW
H46
(COVER OFF)
WALL SURFACE
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ADAPTER PLATE |
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PLATE TAB |
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NYLON |
H46 LEADWIRES (2) |
M7907 |
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ELEMENT |
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Fig. 1. Mounting H46D on vertical switch box.
Mounting
Remove the setting knob.
Pull the cover forward from the device to remove.
Install a 2 x 3 in. (51 mm x 76 mm) vertical switch box at the selected location.
Using the two screws provided, fasten the adapter plate to the switch box as shown. See Fig. 1.
Pull the wires from the switch box through the opening in the adapter plate and connect to the H46 leadwires with the solderless connectors provided. See Fig. 2 through 4 for typical hookup.
Wiring
Disconnect power supply before connecting wiring to avoid electrical shock or equipment damage. All wiring must comply with local codes and ordinances. Do not exceed contact and coil ratings when wiring into the system.
See Fig. 2.
®U.S. Registered |
Trademark |
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69-1001B |
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Copyright © 1996 |
Honeywell Inc. • All Rights Reserved |
X-XX UL |
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H46D HUMIDITY CONTROLLER
FAN |
H46D |
CONTROLLER |
CONTROLLER |
TEMPERATURE |
HUMIDITY |
RISE |
FALL |
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FAN MOTOR |
HUMIDIFIER |
L1 |
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(HOT) |
L2 |
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POWER
SUPPLY 1
1 PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED. |
M7910 |
Fig. 2. Typical wiring diagram for H46D single-speed fan motor.
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FAN CONTROL |
COOLING |
L1 (HOT) |
L2 |
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L4068 |
RELAY R8230 |
POWER |
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FAN MOTOR |
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SUPPLY |
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LO |
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1 |
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C |
HI |
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SAIL |
2 |
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SWITCH |
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S688A |
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1PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2TO ENSURE HUMIDIFIER OPERATION IN WINTER WHEN THERMOSTAT SUBBASE FAN SWITCH IS AT ON OR AUTO, ADD SAIL SWITCH TO SYSTEM AS SHOWN.
3TO PREVENT HUMIDIFIER OPERATION IN SUMMER, TURN H46D KNOB
TO OFF POSITION.
3
H46D 
HUMIDITY HUMIDITY 
FALL
CONTROL
HUMIDIFIER
MOTOR
M7911
Fig. 3. Typical wiring diagram for H46D in forced air system with 2-speed fan motor.
H46D
HUMIDITY
FALL
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RA89A RELAY |
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T |
T |
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TRANSFORMER |
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RELAY |
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JUMPER |
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REMOVED |
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2 |
1 |
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3 |
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4 |
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FAN |
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HUMIDIFIER |
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MOTOR |
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FAN |
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CONTROL |
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L1 |
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L2 |
(HOT) |
L1 |
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(HOT) |
L2 |
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POWER |
1 |
POWER |
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SUPPLY |
1 |
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SUPPLY |
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1 |
PROVIDE DISCONNECT MEANS AND OVERLOAD |
M7912 |
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PROTECTION AS REQUIRED. |
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Fig. 4. Typical wiring diagram for H46D with a switching relay.
SETTING AND ADJUSTMENT
The H46 makes contact on a relative humidity fall to the set point to start the humidifier. On an increase in relative humidity to the set point (plus the differential), the switch breaks contact to stop the humidifier. Turn the knob clockwise to the setting stop to place the H46 in the ON position. Turn the knob counterclockwise to the setting stop to place the H46 in the OFF position.
CHECKOUT
After all mounting and wlring is completed, turn on the power supply. Place the system into operation by turning the setting knob toward the high end of the scale until the humidifier motor starts (on central unit humidifier systems, the furnace fan must be running before the humidifier starts). Turn the setting knob slowly toward the low end of the scale until the humidifier motor stops.
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Home and Building Control |
Home and Building Control |
Helping You Control Your World |
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Honeywell Inc. |
Honeywell Limited-Honeywell Limitée |
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1985 Douglas Drive North |
155 Gordon Baker Road |
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Golden Valley, MN 55422 |
North York, Ontario |
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M2H 2C9 |
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69-1001B J.S. 4-96 Printed in Taiwan R.O.C |
2 |
www.honeywell.com/yourhome. |
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